sticks are nice, tiger2s are nice, four stars are nice, venture 60 is nice,

any of the above I would say are exellent choices.

my first "aerobatic" plane was a CG Super Chipmunk and can make a good second plane but is probably better as a 3rd another option which has not been mentioned is something like the U-Can-Do 3d. this is a 3d plane but if you tone the throws down it is a simple pleasure to fly. go as slow or fast as you want, it doesnt float down on landings, it stops, looks both ways, then touches down on its tip toes . the only thing ou have to wathc for is im not sure how it would hold up to a "hard" landing. you may want to get to the point were you can grease your trainer consistently before you try this.

also another over looked option. use your trainer to fly aerobatics.

increase the throws on everything, move the CG back a bit at a time then see what it can do.

it amazing what a little trainer can do when you set it up right, I had a little .20 size that would do the most awsome flat spins, you would set it up, spin it, flatten it out then let go of the sticks and it would just spin and spin, it was fun to watch. and recovery was simply opposite rudder and a blast of power and would fall right out, (or a ton of rudder and aileron and about 20' if the engine was dead )

ask your instructor if he can start teaching you some basic aerobatics such as rolls and loops and snap-rolls and such. also ask him for some stall recovery practice you will need it if you start aerbatics.

good luck and keep practicing